Genetic Variant AP5Z1:p.Ala529Pro (chr7-4788284-G-C) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_014855.3(AP5Z1):c.1585G>C(p.Ala529Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000695 in 1,438,286 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A529T) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.0e-7 ( 0 hom. )

Consequence

AP5Z1
NM_014855.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.37

Publications

0 publications found

Variant links:

Genes affected

AP5Z1 (HGNC:22197): (adaptor related protein complex 5 subunit zeta 1) This gene was identified by genome-wide screen for genes involved in homologous recombination DNA double-strand break repair (HR-DSBR). The encoded protein was found in a complex with other proteins that have a role in HR-DSBR. Knockdown of this gene reduced homologous recombination, and mutations in this gene were found in patients with spastic paraplegia. It was concluded that this gene likely encodes a helicase (PMID:20613862). [provided by RefSeq, Jan 2011]

AP5Z1 Gene-Disease associations (from GenCC):

hereditary spastic paraplegia
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
hereditary spastic paraplegia 48
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet

AP5Z1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.057136655).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014855.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
AP5Z1	NM_014855.3	MANE Select	c.1585G>C	p.Ala529Pro	missense	Exon 12 of 17	NP_055670.1
AP5Z1	NM_001364858.1		c.1117G>C	p.Ala373Pro	missense	Exon 11 of 16	NP_001351787.1
AP5Z1	NR_157345.1		n.1716G>C		non_coding_transcript_exon	Exon 12 of 17

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
AP5Z1	ENST00000649063.2	MANE Select	c.1585G>C	p.Ala529Pro	missense	Exon 12 of 17	ENSP00000497815.1
AP5Z1	ENST00000650581.1		c.385G>C	p.Ala129Pro	missense	Exon 3 of 7	ENSP00000497156.1
AP5Z1	ENST00000469614.1	TSL:2	n.59G>C		non_coding_transcript_exon	Exon 1 of 4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.95e-7

AC:

AN:

1438286

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

713540

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33006

American (AMR)

AF:

0.00

AC:

AN:

41712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25638

East Asian (EAS)

AF:

0.00

AC:

AN:

38636

South Asian (SAS)

AF:

0.00

AC:

AN:

82896

European-Finnish (FIN)

AF:

0.00

AC:

AN:

50632

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4414

European-Non Finnish (NFE)

AF:

9.07e-7

AC:

AN:

1101972

Other (OTH)

AF:

0.00

AC:

AN:

59380

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.094

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.73

CADD

Benign

0.14

(source)

DANN

Benign

0.66

DEOGEN2

Benign

0.025

Eigen

Benign

-1.7

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.090

LIST_S2

Benign

0.17

M_CAP

Benign

0.0093

MetaRNN

Benign

0.057

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.90

PhyloP100

-1.4

PrimateAI

Benign

0.39

PROVEAN

Benign

-0.79

REVEL

Benign

0.12

Sift

Benign

0.28

Sift4G

Benign

0.30

Polyphen

0.59

Vest4

0.12

MutPred

0.24

Gain of glycosylation at A529 (P = 0.0437)

MVP

0.014

ClinPred

0.38

GERP RS

-8.1

Varity_R

0.088

gMVP

0.22

Mutation Taster

=92/8

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over